The congressman posted a photo Wednesday on Facebook of the family’s newest addition, writing: “Last night we welcomed our beautiful little girl into the world. The best part was witnessing the anticipation and joy of her siblings meeting her for the first time. They could hardly contain their excitement as they waited their turn to hold their brand new sister.”

Duffy, 42, also wrote of his wife, Rachel Campos-Duffy, “Mom was incredible. Thank you all for your prayers. #lucky7”

A Duffy spokeswoman tells ITK the congressman has yet to share a name for the family's fifth girl, who weighed in at 6 pounds, 5 ounces and measured 20 inches long. She said, "Mom and daughter are doing great, and the entire family is overjoyed!"